blue colored eggs

I have 7 hens that are 20 weeks today! When should I expect eggs? I'm overly excited for my egg colors! I do have two roosters in my flock a pure whiting true blue and a tolburt Polish frizzle! My girls list below: 1 pure BBS Ameraucana 2 whiting true blue ( one 18 weeks) 1 Silkie 1 Speckled...

For the last week or so I have been finding a strange looking egg in our coop nearly every day. It looks as if blue food coloring had been smeared all over the shell. I checked for any environmental causes and can't find the cause. Can you guys shed some light on what's causing these colored...